How do I know a valid signature?
Discussion
Valid is defined by the accounting protocol.
How?
Like this 
What do the letters mean? Maybe break down each one
s= the y coordinate of the curve
z= the hash of the txn data
G= the generator point of the curve
r= is the private key
Q= is the public key
R= is the signature.
Nice! So all data for this accounting system has a signature?
Yes.
Huh. This one doesn't seem to have a signature on it. Maybe I missed it.
Dude. There's no unlocking script on coinbase Txns but do you see that little thing that says "Scriptsig" what do you think "sig" means?
You're telling me that's a signature here?
How will I recognize these individual data points in the accounting protocol so I might arrange them in the correct order for the equation?
Give me the simplest example of how it's done, please.
All the data that is part of the accounting protocol. Is any of it 'random'?